Method and device for applications of selective organ cooling

Details Method and device for applications of selective organ cooling Method and device for applications of selective organ cooling

A - Human Necessities

61

M

A61M 1/36 (2006.01) A61F 7/12 (2006.01)

Patent

CA 2336071

The invention provides a method and device for heating or cooling a surrounding fluid in a feeding vessel. The device includes a catheter assembly capable of insertion to a selected feeding vessel in the vascular system of a patient. The assembly includes a heat transfer element at a distal end of the catheter assembly, the heat transfer element (14) having a plurality of exterior surface irregularities (20, 24) shaped and arranged to create turbulence in a surrounding fluid, the surface irregularities (20, 24) having a depth at least equal to the boundary layer thickness of flow of the surrounding fluid in the feeding vessel. The assembly also includes a supply catheter (12) to deliver a working fluid to an interior of the heat transfer element (14), a return catheter (202) to return a working fluid from the interior of the heat transfer element (14), and a drug delivery catheter (312) running substantially parallel to the axis of the catheter assembly.

La présente invention concerne un procédé et un dispositif permettant de chauffer ou de refroidir un fluide environnant dans un vaisseau nourricier. Le dispositif comprend un ensemble cathéter pouvant être inséré dans un vaisseau nourricier choisi du système vasculaire d'un patient. L'ensemble comprend un élément de transfert de chaleur (14) situé à une extrémité distale de l'ensemble cathéter, lequel élément de transfert de chaleur (14) comprend plusieurs irrégularités (20,24) superficielles extérieures conformées et agencées pour créer des turbulences dans un fluide environnant, les irrégularités superficielles (20,24) présentant une profondeur au moins égale à l'épaisseur de la couche limite du flux de fluide environnant dans le vaisseau nourricier. L'ensemble comprend également un cathéter d'alimentation (12) destiné à distribuer un fluide de travail à l'intérieur de l'élément de transfert de chaleur (14), un cathéter de retour (202) destiné à renvoyer le fluide de travail depuis l'intérieur de l'élément de transfert de chaleur (14), et un cathéter d'administration de médicament (312) sensiblement parallèle à l'axe de l'ensemble cathéter.

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